IAT (IISER) 2025

\(\text { Which of the following reactions do NOT provide an aldehyde as a product? }\)

What is the time period of revolution of an electron in the fourth Bohr orbit of $\mathrm{He}^{+}$?
[Bohr radius $=52.9$ picometers, mass of an electron $=9.11 \times 10^{-31} \mathrm{~kg}$, Planck's constant $=6.626 \times 10^{-34} \mathrm...

The dipole moments of three $\mathrm{AB}_3$-type molecules $\mathbf{I}, \mathbf{I I}$, and $\mathbf{I I I}$ are measured to be $0.0 \mathrm{D}, 0.2 \mathrm{D}$, and 1.5 D , respectively. Which one of the following options is correct regardi...

Which among the following processes is/are associated with increasing bond order but no change in diamagnetic/paramagnetic behaviour?
(i) $\mathrm{N}_2 \rightarrow \mathrm{~N}_2^{+}+\mathrm{e}^{-}$
(ii) $\mathrm{O}_2 \rightarrow \mathrm{O}_...

At a particular temperature, the magnitude of the rate constant of a reaction is $5 \times 10^{-5}$ and the unit of the pre-exponential factor of the Arrhenius equation for this reaction is $\mathrm{mol} \mathrm{L}^{-1} \mathrm{~min}^{-1}$....

\(\text { What is the major product in the reaction sequence given below? }\)

Which one of the following statements best describes the acidic/basic/amphoteric nature of ZnO and CaO ?

\(\text { What are the correct orders of stability for the following compounds? }\)

What is the value of $E^{\circ}\left(\mathrm{Fe}^{3+} / \mathrm{Fe}^0\right)$ ?
[The standard reduction potential values are $E^{\circ}\left(\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}\right)=0.77 \mathrm{~V}$, and $\left.E^{\circ}\left(\mathrm{Fe}...

During the charging and discharging of a lead-acid battery (a Pb anode, a grid of Pb packed with $\mathrm{PbO}_2$ as cathode, and an aqueous solution of $\mathrm{H}_2 \mathrm{SO}_4$ as an electrolyte), which of the following redox reactions...

\(\text { How many } \beta \text {-hydrogen is/are present in 2-methyl-3-phenyl-pentan-1-al? }\)

Compound $\mathbf{I}$ undergoes hydroboration-oxidation reaction with $\left(\mathrm{BH}_3\right)_2$ followed by treatment with $\mathrm{H}_2 \mathrm{O}_2$ and aqueous NaOH to produce another compound II, which upon oxidation with $\mathrm{...

\(\text { What are the major products formed in the following reaction sequence? }\)

\(\text { Consider the following reaction scheme: }\)
\(\text { Which among the following statements is correct? }\)

The work done when one mole of an ideal gas expands at constant temperature $T$ from volume $V$ to $2 V$ (in two equal steps of volume in a linear fashion) is $\frac{7}{12} R T$. How much more work would be done by the gas if it expands in ...